Damping characteristics and parameter identification of an asymmetric hysteresis model of entangled metallic wire materials/disc springs laminated composite dampers

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (20) : 270-276.

WU Yiwan, CHENG Hu, BAI Hongbai, ZI Bao, TANG Yu

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Abstract

In view of the low damping performance of disc springs (DS), natural rubber-disc springs, and their weak ability to resist high temperature and other harsh environments, the laminated composite dampers with elastic damping entangled metallic wire materials (EMWMs) were studied by sinusoidal force excitation method. The effects of different excitation conditions and different EMWMs densities on the damping performance of entangled metallic wire materials/disc springs laminated composite dampers (EMWM/DS) were analyzed by taking energy dissipation factor, loss factor and dynamic average stiffness as evaluation indexes. Based on the equivalent damping model of the trace method, considering the variation of elastic restoring force and damping force with the amplitude and frequency of deformation, the asymmetric hysteresis model of the EMWM/DS under specific load was established by the identification method of parameter decomposition. The results show that the theoretical loop is consistent with the measured curve, and the parameter identification accuracy can meet engineering application requirements.
Key words: entangled metallic wire material (EMWM); disc spring(DS); laminated composite structure; dynamic damping; asymmetric hysteresis model; parameter identification

Key words

entangled metallic wire material (EMWM) / disc spring(DS) / laminated composite structure / dynamic damping / asymmetric hysteresis model / parameter identification

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WU Yiwan, CHENG Hu, BAI Hongbai, ZI Bao, TANG Yu. Damping characteristics and parameter identification of an asymmetric hysteresis model of entangled metallic wire materials/disc springs laminated composite dampers[J]. Journal of Vibration and Shock, 2022, 41(20): 270-276

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